Grinding and polishing machine.



PATENTED APR. 30, 1907.

F- L. O. WADSWORTH. GRINDING AND POLISHING MACHINE. APPLIGATIOH FILED JUNE 24. 1905. RENEWED AUG. 27, 1906.

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, INVENTOR G M 40- 76% S E s y s s, "w M M PATENTED APR. 30, "1907.

F. L. O. WADSWORTH. GRINDING AND POLISHING MACHINE. APPLICATION FILED JUNE 24, 1905. RENEWED AUG. 2'], 1906.

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WIT NESSES unfrnn sriiirns PATl-CNT OFFICE.

l ltiiN K L. WADSWOltllI, (ll HOKGA N YIOWN, WEST VIRGINIA, ASSIGNUR T0 PRESSIDD PRISM l liA'llfi GLASS COMPANY, OF NEW YORK. N.

(.lORPORAllUN ()l EST VIRGlNIA.

GRINDING AND POLISHING MACHINE.

Specification of Letters Patent.

' Patented April 30,1907.

Be it known that .I, FRANK ll. 0. Whos machine construclcd in accordance with my 1 2 is a detail view of thc invention; Fig. wheel bearings and their connections; Fig. 3 a plan. view showing one arrangement of the track and turntable: and Fig.

4 is a partial plan vicwshowing another arrangcment which is the preferred arrangement of the same.

In my apparatus I employ a movable bridge carried 11 on wheels 16 movable upon tracks 1 7. The bearings .for these wheels are formed inthe lower parts of vertical hollow s indles 18 which extend up through suitab e bearin s. in the castings 19 forming the end of the )ridgc, within which hollow spindle is a driving shalt carrying at its upper end a hovel wheel 2.20 and provided at its ower end with bevel gearing 21 driving a stub shaft :22 to which the supporting wheel is secured. The wheels 20 are driven. by bevel pinions M tending across the l. ridge and having hand wheels 25 at each end. In this manner the bridge may be moved along its tracks, while at the same time" castors or su porting wheels may be turned around on tieir axes for a purpose hereinafter explained.

In the ordinary systems wheretraveling bridges are used the entire bridge is move out in front of one table onto a large turntable andthen turned around at right angles, moved laterally in front of the next table onto another large turntable, and then turned and run forward over this nexttable. In such system the turntables are large and heavy and occupy a large amount of space. Moreover, a grinding bridge and a polishing bridge are used for each table ant part of these bridges were idle a large part of the time. I have done away with the large, heavy turntables, and employ instead of them small turntables on which the supporting wheels of the bridge rest when run out in 23 on a common shal't 24; ex-

front of the table. Thus, I show in Fig. 3 four small turntables el6,-which are arranged to receive the supporting wheels of the bridgc. 'lhc bridge wheels being on rotary spindles, when the small tables are turned the wheels turn with thcm to bring them into alinement with the cross track 47. The bridges then run sidowiso in front of the other table onto 5 a similarlour turntable device, where the l wheels are again shifted and the bridge then run forward over the next table. This systom enables one grinding and one polishing i bridge to supply lour tables, thus reducing the cost of the system and economizing spaccflis the lour small tables take up much less room than in the single large table.

In the construction shown in Fig. 4 the grinding tables are arranged in two parallel rows, and the transverse tracl's on which the bridge is run are parallel thereto. In this end of the row and moved continuously Iorward from one table to the next until the end of that row 18 reached.

construction and arrangement as those shown in Fig. 3. These tables are turned, carrying with them the transfer wheels 16 of the bridges, and the bridge run across to four similar turntables at intersections of the cross transfer tracks 47. with the longitudinal transfer tracks of the second row of grinding tables. These transverse wheels and tables the bridges into line of the second set of Iongitudinal transfer tracks and the operation continued on the second row of grinding tables in the same manner but in a reverse I direction to that'on the first row. When the bridges have rea hed the end of thissecond ferred to bring them to the initial position in front of the firstrow and the operation repeated. With this plan the only transfer operations involved are those required at the end of each row, and the operation is simpler and more rapid than the operations required in the systemv shown in Fig. 3.

The use of my invention also enables the grinding and polishing operations to be rapidly carried out successively on a series of tables; it also permits the attendants to follow the grindingand-polishing operations arrangement the bridges are started at one' are then turned again to bring the wheels of- They are then run" onto four small turntables 4b, of the same row of grinding tables they are again trans- .work arranged side by side, a track for each 1 a sea ioe system, cross tracks having turntables at the junetures and bridges movable on the tracks and having grindin'g'or polishing apparatus thereon; substantially as described.

5. In a grinding or polishing system, series ofwork-supporting tables, a track leading past the tables, bridges arranged to travel on the track and carrying polishing mechanism, a return track, and means for transferring the first named track to the return track; substantially as described.

-6. In a grinding or polishing system, a series of wort-supporting tables, a track leading past the tables, bridges arranged to travel 'on the track and carrying grinding or polishing n1echanis1n,'a return track, means for transferring the bridges from the first named track to the return track and a second and prepare the tables for another operation.

I claim 1 In a grinding orpolishing system having traveling bridges, supporting wheels for the bridges mounted on rotary stemaand small turntables on which the 'Wheels'are adapted to rest, said small turntables being located in front of the table; substantially as described. l 1

2. In a grinding or polishing bridge systern, a pair of tables having tracks leading l outwardly therefrom, transverse tracks be tween the table tracks, and small turntables at the junctures of the tracks arranged to turn the spindles of the supporting wheels for the bridges f' substantially as described.

3.111 a grinding or polishingflsystein, -a series of Work-su porting tables, two track systems at an ang e to each other, bridges arranged to travel series of tables along the return track; substantially as described.

In testimony whereof, I have hereunto set niy hand on the track'systenis, grinding or polishing mechanism carried by the bridges, and means for transferring the bridges from one track system to another; substantially as described.

e. In a grinding or polishing system, two series of rotary tables for supporting the FRANK L. O. WADSWORTH. Witnesses JOHN MILLER,

H. M. Conwm.

grind ng or bridges from the 1 

